Speedometer Pinion Gear Chart

Source: 1972 Dodge FSM

Speedometer Pinion Gear Chart
All Car Lines - All Transmissions
Number of Teeth on Pinion Gear Listed Under Each Axle Ratio.

Tire

Size     2.45  2.71  2.76  2.93  2.94  3.21  3.23  3.54  3.55  3.91  4.10   

24.06     27    29    30    32    32    35    35    38    38    42    44    

24.84     26    29    29    31    31    34    34    37    37    41    43     

25.15     26    28    29    31    31    33    34    37    37    41    43    

25.47     25    28    28    30    30    33    33    36    36    40    42     

26.01     25    27    28    30    30    32    33    36    36    39    41    

26.71     24    27    27    29    29    32    32    35    35    39    40    

27.34     24    26    26    28    28    31    31    34    34    37    39    

27.01     24    27    27    29    29    31    32    35    35    38    40    

27.71     24    26    27    28    28    31    31    34    34    38    39    

28.34           26    26    28    28    30    30    33    33    37    38    

28.65           25    26    27    27    30    30    33    33    36    38    

28.88           25    25    27    27    29    29    32    32    35    37    

24.29     26    28    29    31    31    34    34    37    37    41    43    

24.78     25    28    28    30    30    33    33    36    36    40    42 

25.41     25    27    28    30    30    32    33    36    36    39    41 

26.97     24    26    26    28    28    31    31    34    34    37    39 

23.82     25    28    28    30    30    33    33    36    37    40    42 

24.24     25    28    28    30    30    33    33    36    36    40    42 

24.78     25    27    28    29    29    32    32    35    35    39    41 

Note: Pinions with less than 26 teeth require a different adapter than the one used for all other pinions.